I hear a lot about subtyping tables when designing a database, and I'm fully aware of the theory behind them. However, I have never actually seen table subtyping in action. How can you create subtypes of tables? I am using MS Access, and I'm looking for a way of doing it in SQL as well as through the GUI (Access 2003). Cheers! ...
In Scala, the PartialFunction[A, B] class is derived from type Function[A, B] (see Scala Reference, 12.3.3). However, this seems counterintuitive to me, since a Function (which needs to be defined for all A) has more stringent requirements than a PartialFunction, which can be undefined at some places. The problem I've came accross was t...
Hi, I just created an event handler to determine when a new item is added to the solution explorer; however, I'm unable to obtain the properties of the item(Name, etc). In the event handler method, I just have my project item. Is there any way I could possibly use an interface to obtain the information I need? Thank you! ...
Hello, Using Visual Studio's Managed Package Framework, how can I inherit from C# so I can have C# property pages and C# project items? I've tried making a flavored project, but it was limited in terms of making our own custom nodes and custom file properties. When using the MPF, however, I cannot seem to obtain those C# properties that...
This is with C# and .net 3.5 Let's say I have the following method: myMethod(myBaseClass mbc) In my project, all the following classes inherit from myBaseClass. ot1:myBaseClass ot2:myBaseClass ot3:myBaseClass ot4:myBaseClass Are there any tricks that will let me use myMethod with ot1 and ot3 but NOT ot2 and ot4, or do I basically ...
Anyone see this before? I have a large Visual Studio project that keeps adding [Subtype] Designer[/Subtype] to my .vcproj then removing it on the next open and close of the project. There is only one class defined in StoredImageControl.cs. Anyone know how to shut this off as it is really messing up my revision control. This is befor...
I have run into an issue when creating a object type in Oracle 10g that inherits from a supertype. We currently have many object types that inherit from this supertype and recently the compiler started throwing the following errors ORA-30745: error occured while trying to add column "SYS_NC_ROWINFO$" in table "DATA_CACHE.CACHE_ENTRIES" ...
I think this is about covariance but I'm weak on the topic... I have a generic Event class used for things like database persistance, let's say like this: class Event( subject: Long, verb: String, directobject: Option[Long], indirectobject: Option[Long], timestamp: Long) { def getSubject = subject def getVerb = verb def...
I'm interested to know the complete set of alternatives to subtype polymorphism in scala. ...
I know this has been asked a thousand times and people will say that the @pagecurl will get rejected. I tried reasoning with the client but they insist they want to push the app with that function in and it will have a chance of not being rejected. The problem is that if I try animation.subtype , the animation will not listen to it. ...
I am working on a program in which you can register complaints. There are three types of complaints: internal (errors from employees), external (errors from another company) and supplier (errors made by a supplier). They hold different data which cannot be shared. I currently have 4 tables (complaint, employee, company and supplier). Her...